Patent US3944492A successfully refreshed from Google Patents.
US3944492A
Expired / Lapsed
US
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Lubricant compositions containing N-substituted naphthylamines as antioxidants
Assignee: Uniroyal Chemical Co Inc
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Filing: 1972-05-22
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Granted: 1976-03-16
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Expires: 1992-05-22
Abstract
Abstract Derivatives of diphenylamine or phenylnaphthylamine of the types ##SPC1## Where R 1 , R 9 and R 12 are phenyl or p-tolyl groups and the remaining R's, X and Y may be alkyl or various other substituents, are useful antioxidants for lubricating oils or for various polymeric substrates (e.g. polypropylene) especially in combination with a dialkyl thiodipropionate. Typical antioxidants are 4,4'-bis-(alpha,alpha-p-trimethylbenzyl)diphenylamine made by reacting p,alpha-dimethylstyrene with diphenylamine, and N-(4-alpha,alpha-dimethylbenzylphenyl)-1-(alpha,alpha dimethylbenzyl)-2-napthylamine made by reacting alpha-methylstyrene with N-phenyl-2-naphthylamine.
Inventors
- 👤 Edward L. Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:26
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C09; C09K; C09K15/00; C09K15/04; C09K15/16; C09K15/18; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2219/00; C10M2219/06; C10M2219/08; C10M2219/082; C10M2219/085; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/08; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
40 words
A composition comprising a major amount of a substrate which is a lubricating oil, containing intimate admixture, as an antioxidant, a stabilizing amount of a chemical selected from the group consisting of N-(4-alpha, alpha-dimethylbenzylphenyl)-1-naphthylamine, N-(4-alpha, alpha-dimethylbenzylphenyl)-2-naphthylamine, and N-(4-alpha, alpha-dimethylbenzylphenyl)-1-(alpha, alpha-dimethylbenzyl)-2-naphthylamine.
Claim 2
Dependent Claim
40 words
A composition comprising a major amount of a substrate which is a lubricating oil, containing intimate admixture, as an antioxidant, a stabilizing amount of a chemical selected from the group consisting of N-(4-alpha, alpha-dimethylbenzylphenyl)-1-naphthylamine, N-(4-alpha, alpha-dimethylbenzylphenyl)-2-naphthylamine, and N-(4-alpha, alpha-dimethylbenzylphenyl)-1-(alpha, alpha-dimethylbenzyl)-2-naphthylamine.
Claim 3
Dependent Claim
13 words
A composition as in claim 1 in which the said chemical is N-(4-alpha,alpha-dimethylbenzylphenyl)-1-naphthylamine.
Claim 4
Dependent Claim
13 words
A composition as in claim 1 in which the said chemical is N-(4-alpha,alpha-dimethylbenzylphenyl)-2-naphthylamine.
Claim 5
Dependent Claim
15 words
A composition as in claim 1 in which the said chemical is N-(4-alpha, alpha-dimethylbenzylphenyl)-1-(alpha, alpha-dimethylbenzyl)-2-naphthylamine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |